The present invention be directed to the chloro- 1- methyl -2,3 of (R) -8-, the crystal form of 4,5- tetrahydro -1H-3- benzazepines, containing their compositions, preparation method and purposes.本發明針對(R)-8-氯-1-甲基-2,3,4,5-四氫-1H-3-苯并氮雜卓的晶型,含有它們的組合物,製備方法和用途。